<template>
  <div class="login">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">小聚支付合伙人系统</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" auto-complete="off" placeholder="账号" size="large" type="text">
          <template #prefix>
            <svg-icon class="el-input__icon input-icon" icon-class="user" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input v-model="loginForm.password" auto-complete="off" placeholder="密码" size="large" type="password" @keyup.enter="handleLogin">
          <template #prefix>
            <svg-icon class="el-input__icon input-icon" icon-class="password" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item v-if="captchaEnabled" prop="code">
        <el-input v-model="loginForm.code" auto-complete="off" placeholder="验证码" size="large" style="width: 63%" @keyup.enter="handleLogin">
          <template #prefix>
            <svg-icon class="el-input__icon input-icon" icon-class="validCode" />
          </template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" class="login-code-img" @click="getCode" />
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin: 0px 0px 25px 0px">记住密码</el-checkbox>
      <el-form-item style="width: 100%">
        <el-button :loading="loading" size="large" style="width: 100%" type="primary" @click.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div v-if="register" style="float: right">
          <router-link :to="'/register'" class="link-type">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2022-2024 小聚支付合伙人系统</span>
    </div>
  </div>
</template>

<script setup>
  import { getCodeImg } from '@/api/login';
  import Cookies from 'js-cookie';
  import { encrypt, decrypt } from '@/utils/jsencrypt';
  import useUserStore from '@/store/modules/user';
  import { useRouter } from 'vue-router';
  import { getCurrentInstance, ref } from 'vue';

  const userStore = useUserStore();
  const router = useRouter();
  const { proxy } = getCurrentInstance();

  const loginForm = ref({
    username: 'admin',
    password: 'admin123',
    rememberMe: false,
    code: '',
    uuid: '',
  });

  const loginRules = {
    username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
    password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
    code: [{ required: true, trigger: 'change', message: '请输入验证码' }],
  };

  const codeUrl = ref('');
  const loading = ref(false);
  // 验证码开关
  const captchaEnabled = ref(true);
  // 注册开关
  const register = ref(false);
  const redirect = ref(undefined);

  function handleLogin() {
    proxy.$refs.loginRef.validate((valid) => {
      if (valid) {
        loading.value = true;
        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set('username', loginForm.value.username, { expires: 30 });
          Cookies.set('password', encrypt(loginForm.value.password), { expires: 30 });
          Cookies.set('rememberMe', loginForm.value.rememberMe, { expires: 30 });
        } else {
          // 否则移除
          Cookies.remove('username');
          Cookies.remove('password');
          Cookies.remove('rememberMe');
        }
        // 调用action的登录方法
        userStore
          .login(loginForm.value)
          .then(() => {
            router.push({ path: redirect.value || '/' });
          })
          .catch(() => {
            loading.value = false;
            // 重新获取验证码
            if (captchaEnabled.value) {
              getCode();
            }
          });
      }
    });
  }

  function getCode() {
    getCodeImg().then((res) => {
      captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
      if (captchaEnabled.value) {
        codeUrl.value = 'data:image/gif;base64,' + res.img;
        loginForm.value.uuid = res.uuid;
      }
    });
  }

  function getCookie() {
    const username = Cookies.get('username');
    const password = Cookies.get('password');
    const rememberMe = Cookies.get('rememberMe');
    loginForm.value = {
      username: username === undefined ? loginForm.value.username : username,
      password: password === undefined ? loginForm.value.password : decrypt(password),
      rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
    };
  }

  getCode();
  getCookie();
</script>

<style lang="scss" scoped>
  .login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-image: url('../assets/images/login-background.jpg');
    background-size: cover;
  }

  .title {
    margin: 0px auto 30px auto;
    text-align: center;
    color: #707070;
  }

  .login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 400px;
    padding: 25px 25px 5px 25px;

    .el-input {
      height: 40px;

      input {
        height: 40px;
      }
    }

    .input-icon {
      height: 39px;
      width: 14px;
      margin-left: 0px;
    }
  }

  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }

  .login-code {
    width: 33%;
    height: 40px;
    float: right;

    img {
      cursor: pointer;
      vertical-align: middle;
    }
  }

  .el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
  }

  .login-code-img {
    height: 40px;
    padding-left: 12px;
  }
</style>
